An atom walks into a bar. The bartender asks him if he's all right and the atom shakes his head. "No. As a matter of fact, I lost an electron. "Are you sure?" asks the bartender. "Yeah," says the atom. "I'm positive."
A catalyst walks into a bar. The bartender stops him at the door and says, "Absolutely not. You are not allowed to enter." The catalyst asks why. "Because," says the bartender, "last time you started something."
Okay, here's the last one.
An electron went flying down the highway. A cop pulls him over. "Do you know how fast you were going?" the officer asks. "Nope," says the electron. "EIGHTY EIGHT!" says the policeman. "Oh, great," says the electron. "That means I'm lost!"
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